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Finding the Fourth Proportional to 7,390, 11,085.04 and 1,918

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Solution

The fourth proportional to 7,390, 11,085.04 and 1,918 is: 2,877.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,390 : 11,085.04 = 1,918 : x
  2. Step 2: Convert to fraction form
    7,390/11,085.04 = 1,918/x
  3. Step 3: Cross multiply
    7,390x = 11,085.04 × 1,918
  4. Step 4: Simplify right side
    7,390x = 21,261,106.72
  5. Step 5: Solve for x
    x = 21,261,106.72/7,390
  6. Step 6: Final answer
    x = 2,877.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.